答案已经知道,求原因(解释)They have to go ——(cross) the river to school every day.They have to go a cross the river to school every day.为什么要填 (a cross)呢?

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答案已经知道,求原因(解释)
They have to go ——(cross) the river to school every day.
They have to go a cross the river to school every day.
为什么要填 (a cross)呢?

go across=cross,across是副词和介词,而cross是动词,所以填across.

不是a cross,而是across. 横过的意思。

句型:It is + 形容词 + sb + to do sth
go across = cross

句型:It is + 形容词 + sb + to do sth
go across = cross

那不是a cross 是across一个词,介词通过

go across 是词组,穿过的意思,谢谢!

across是介词cross是动词 句子中有动词go了 所以只能介词across了 如果没有go就用cross了